We were playing with a sweet LED matrix accessory, scroll:bit by Pimoroni scroll:bit - Pimoroni
Now, we want to use this with the BrainPad but to do so we will need to know what chip is used on there. Looking at the code GitHub - pimoroni/pxt-scrollbit: pxt-microbit package for the Pimoroni scroll:bit there is not a single mention of what chip is being used! I guess I can just start with their code and modify it to work. But I am still curious about this chip!
So, peeking under a microscope at this tiny chip
It is TINY!!! Do you want to see it next to a pen? It is 4x4mm only!
How come this tiny chip withe few pins drive 144 LEDs?! Doing some searching I found out it is a part by ISSI Page Not Found
This chip is impressive, so good job for ISSI for making it and Pimoroni for using it. The board layout is also nice.
Next time I will be coding this little 4x4mm chip!